Light Cones and Simultaneity

  1. Please tell me if I have this correct. A particle has both a future light cone and a past light cone. In the past is everything that can affect the particle without exceeding Special Relativity. Now let’s say you have 2 entangled particles and you measure them so that each measurement is taken outside of the other particle’s light cones. Determining which measurement was taken first requires a specific inertial frame of reference. If that’s correct then you can’t determine which measurement was taken first absolutely since you can always pick a specific inertial frame of reference which disagrees. (The events don’t require entanglement. I’m just thinking about QM.)
  2. jcsd
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